954 INDEX. Hermaphrodite flowers, and wind fertiliza¬ tion, ii. 134. crossing in, ii. 301. Linnean view, ii. 291, Hermlnium, scent, ii. 202. Hermlnlum Monorchis, poUination, li. 256. Herniaria glabra, perennial, u. 453. Herpes tonsurans, due to Tricophyton ton¬ surans, i. 169. Hesperides, of Braun, ii. 605. Hesperis matronalis, attraction of poUen- tubea by foreign ovules, ii. 414. opening of flower, u. 212, 221. scent, U. 201. 209, Heaperia triatia, night visitors, iL 197. opening of flower, II. 212. perfume, ii. 201, 208, 242, Heterochromatism of flowers, 11. 569, Hetercecism, of Uredineae, 11. 686. Heterogamy, and autogamy, ii. 340, 390. — various forma, and origin of species, u. 595. Heteromorphism, application of term, ii. 469. HeterophyUous plants, i. 668. Heteropogon, fruit, 1. 620. — moncBclous, 11. 297. Heterosporous Lycopodinae, 11. 477. Heterosporous Pteridophyta, ii. 704. Heterospory, in Equisetales, 11, 711. — of Hydropterides, li. 709. Heterostyled flowers, 11. 302, 396, 398, 405. Hibernating shoots, of Potamogeton crispus, L 551. Hibiscus, stigma, ii. 281. Hibiscus tematus, poUen-grains, ii. 99. Hibiscus Trionum, autogamy, u. 355. — — floral markings, U. 190. opening and closing, 11. 212. vitaUty of spermatoplasm, 11. 96. Hieracium, autogamy, li, 372, 374. — capitula closing and poUination, 1. 741. — geitonogamy, ii. 319. ~ hybrids, ii. 585. — indumenta of hybrids, u. 564. — leaves and light, 1, 410, Hieracium aurantiacum and H. pUosellae- forme, hybrid, 11. 558. Hieracium Auricula, stolona, U. 663. Hieracium gymnocephalum, Dalmatia, 1. 319. Hieracium murorum, and bud-galls of Aulax Hieracii, u. 543. Hieracium PUoseUa, and gall of PsyUodes, u. 532. anthocyanin in florets, ii. 220. procumbent, 1. 661. protection of poUen, 11.112,114. rolUng up of leaves, L 314. stolons, i. 663. Hieracium staticefoUum, fiowers after pollination, ii. 286. Hieracium stoloniflorum, hybrid of H. aurantiacum x H. plloaeUaeforme, 11,586. mean crosa, U. 558. Hieracium sylvaticum, and bud-galls of Aulax HleracU, U. 543. Hieracium tenuifolium, anthocyanin, i, 520. Hieracium tridentatum, and bud-galls of Aulax Hieracii, il. 543. Hieracium umbeUatum, autogamy, ii. 361. Hieracium viUoaum, protection of stomata by hairs, i. 292. Hierochloa, hermaphrodite and staminate flowers, ii. 297. — scent, u. 201. Hierochloa auatralia, dichogamy, U. 312, High Alpine plants, autogamy in, U. 399. Higher plants not derived from lower, ii. 614. HUar caruncle, &o., 11. 425- HUdebrand, and anatomical characters of OxaUs hybrids, ii. 565. Hildenbrandtia, ceU arrangement, I. 577. HildenbrandtlaNardi and rosea, incrustlng, L425, HUum, of starch-grain, 1. 460. Himalayas, Edelweiss of, i, 316. — sun and' shade temperatures, 1. 525, Himanthalia, thallus differentiation, ii. 664. Himantogloaeum and Orchis, hybridization, ii, 583, Hippocrepia. poUen expulalon, u. 260. Hippophae, dioecious, U. 300. — hair-scales, i. 324. — perianth and androecium, ii. 752. — pollen storing and dispersion, U. 148,150. — radical shoots, u. 27. — weaving stem, 1. 672. Hippophae rhamnoides, phyllotaxis, L 400. protection of poUen from wet, IL 109. spines, 1. 443. Hippuris, atrial and submerged leaves, il. 505. — integument of ovule, u. 81. — stamens, ii. 86. Hips, of Roses, dispersal, ii. 444. Historia naturalis, Pliny, iL 1. Historiaplautamm, use of term, ii. 1, Holcus, hermaphrodite and staminate fiowers, ii. 297. — polUnation, ii. 142. HoUy. See Ilex Aqmfolium. Holosericeus, texture, 1. 320. Homochromatism of flowers, ii. 569. Homogyne, hermaphrodite and pistiUate fiowers, u. 297. Homogyne alpina, geitonogamy, ii. 321. Homogyne discolor, i. 303. Homologiea, danger of establishing, U. 615. Homosporous, U. 478. Homosporous Pteridophyta, u. 704. Honesty. See Imnaria. Honey, aUuring, i. 461. — concealment, 11.180,181. — guidance to, ii. 248. — in Nepenthes pitchers, 1.134. — secretion, ii. 172,173. Honey-bee, colour preference, 11.195. Honey - indicators, name appUed to floral markings, ii. 190. Honey-leaves of Berberidaceae, ii, 178, of Droseraceae, IL 178. of Ranunculaceae, 11,178. Honeyless aUuring contrivances, 11.167 et seq. Honey protection by intra-floral hairs, u. 239. various devices, u. 241. — scent, u. 202, 207. Honeysuckle scent, 11. 201. Hooke, Robert, conflrms Leeuwenhoeck's observations, 1. 21. Hooked seeds, rare, u. 870. — tendrUs of Cobaea, 1. 697. Hooker, Bentham and. Genera Plantarum, ix. 604, — Himadayan Journal on scandent trees, i, 704. — monograph on Welwitschia, ii. 726. Hookeria splendens, leaf structure and greenness, L 387, 590. Hop. See Humulus lupulus. Hop-hornbeam. See Ostrya carpinifolia. Hordeum, glumes, 11. 434, — boat of Ustilago segetum, ii. 675. — poUination, ii. 142. Hormidium, cromatophore, ii. 650. — habitats, il. 650. Hormidium murale, habitat, 1.105. Horminum, honey protection, 11. 241. Hormomyia, gaUs caused by, n. 529, 537, 538, 639, Hormosiphon arcticus, habitat, 11, 621. Hornbeam. See Carpinus. Hornblende, 1. 83. — and Ume in slate, ii. 496. Hornwort. See Ceratophyllum. Horse-chestnut. See .^culvs. Horse-shoe Vetch, See Hippocrepis, Horsetails. See E^isetaceoe. Hortenala, of horticulturists, ii. 187. Hortus siccus, i. 5. Host, action of Bacteria on, i, 162. i — and parasite, intimacy of connection between, in Lophophytum, 1,194, Host, appearance after death of Mistletoe, i 210. —application of term, 1.161. — behaviour towards parasites, L 167. — effect of Euphrasia on, i. 179. — how attacked by Cuscuta, 1.174. — of Lathrsea squamaria, 1.181.^ — partial destmction by fungi, i. 168. Host-root, effect of Langsdorffia tubercle on, i. 187. how affected by Orobanche, L 183,185. Hosta, contrivances for protection, L 164. — of Bartsia, i. 180. — of Cynomorium, chiefly maritime planta, 1.198. — of Lathraea, 1.182. — of Viscum album, 1. 205. Hottonia, food-absorption, i. 765. — heterostyly, u. 302. — poUen dispersion, u. 105. — protective isolation by water, ii. 234. Hottonia palustris, roots absent, L 76, House-leek. See Sempervivum. Houstonia, pollen-grains, U. 99. Hovenia dulcis, pedicel and fruit, H. 435. Hoya carnosa, aids to cUmbing, 1. 687. propagation by leaf-cuttings, u. 41. Humble-bee, and poUen, u. 167. and Salvia glutinosa, ii. 262. colour preference, ix. 195. Humble-bees, as honey stealers, ii. 239. Humic acid, produced by decay, L 101. some properties of, 1.101. Humidity, continued, of atmosphere, injuri¬ ous effect on plants, 1. 283. Humming-birds and honey, IL 180. and lateraUy-directed flowers, n. 225. and poUen-sprinkUng flowers, u. 271 Humous acids, and preservation of fossU planta, 1.262; 11. 612. Humulus, dioecious, ii. 299. — poUen dispersion, il. 143. — poUination, 11.133. — prickles, i, 687. Humulus Lupulus, attacked by Sphaerotheca Castagnei, u. 60. dextrorse twining, L 685. fruit-protecting glands, li. 447. nutation, 1. 683. protogyny, il. 313. aeed-dispersal, II. 854. shoots and climbing hooks, L 688. stem with Cuscuta, i. 175. twining, i. 6ffi2. Humus, constitution and facies of vegeta¬ tion, U, 498. — limitation of avaUablUty to plants, i. 113. — moisture retention, 1. 775. — nature of, 1. 84. — retention of mineral substances, 11, 499. Hundred Tears' Aloe. See Agava ameHcana. Hungarian plains, hairiness of plants, 1. 318. scarcity of Mosses and Perns, ii. 457. — uplands, protected vegetation, L 451. Hura crepitans, detonation, u. 839. Hutchlnsia alpina, autogamy, u. 339. &c., favourite soU, 11. 496. Hutchlnsia petrsea, anthocyanin, i. 521. Hyacinthus, u. 731. — aUuring petals, 11.170. — epiphyUous buds, II. 43. — leaf-bud, emerging from soil, 1, 640. — leaves, and rain conduction, 1. 94. — roots, i. 753. — scent, ii. 200, Hybridization, formative importance of cyto plasm, ii. 494, — general discussion, ii. 317. — nature of, u. 301. — realization of factors in, ii. 573. Hybrids, and origin of species, u, 583. — and reversion, IL 580. , — and season of flowering, ii. 574. — and "transitional forms", ii. 584. : — artiflcial, number of, ii. 555. — change in sexual conditions, ii. 575 — colours in, ii. 566.